We agree with the view taken by the State Commission that there was no manufacturing defect in the tractor.  Finding recorded by the State Commission is a finding of fact, which cannot be interfered with in exercise of revisional jurisdiction.  Under Section 21 of the Consumer Protection Act, 1986, the National Commission, in revision, can interfere with the orders only if it appears that the Authority below has exercised a jurisdiction not vested in it by law or has failed to exercise a jurisdiction so vested or has acted in the exercise of its jurisdiction illegally or with material irregularity.

          We find no error/irregularity in the exercise of jurisdiction by the State Commission in its impugned order.  Dismissed.